Add tests (#5)

Reviewed-on: #5

src/main.rs

@@ -23,7 +23,7 @@ async fn main() {
     match prsr.file_dump().await {
         Ok(contacts) => {
             prsr.print_phone_numbers(&contacts);
-            prsr.save_file(contacts).await;
+            prsr.save_file(contacts, parser::DEFAULT_OUTPUT_FILE).await;
         }
         Err(err) => {
             eprintln!("Error: {err:?}");

src/parser/mod.rs

@@ -1,5 +1,6 @@
 use std::io::BufRead;
 
+pub const DEFAULT_OUTPUT_FILE: &str = "numbers.json";
 const LETTERS: &str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
 
 #[derive(Clone, Debug, Default)]
@@ -40,11 +41,13 @@ impl NumberParser {
         }
     }
 
-    pub async fn save_file(&self, numbers: Vec<textsender_models::contact::Contact>) {
-        let filename = String::from("numbers.json");
-
+    pub async fn save_file(
+        &self,
+        numbers: Vec<textsender_models::contact::Contact>,
+        filename: &str,
+    ) {
         match serde_json::to_string(&numbers) {
-            Ok(json_string) => match std::fs::write(&filename, json_string) {
+            Ok(json_string) => match std::fs::write(filename, json_string) {
                 Ok(_) => {
                     println!("Saved to: {filename:?}");
                 }
@@ -166,3 +169,99 @@ impl NumberParser {
         parsed
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use textsender_models::contact::Contact;
+
+    const TEST_NUMBERS_0: &str = "tests/numbers-0.txt";
+
+    #[test]
+    fn test_file_dump() {
+        let file_exists = {
+            let path = std::path::Path::new(TEST_NUMBERS_0);
+            path.exists()
+        };
+
+        assert_eq!(true, file_exists, "File does not exists {TEST_NUMBERS_0:?}");
+
+        let filename = String::from(TEST_NUMBERS_0);
+        let prsr = super::NumberParser { filepath: filename };
+        let original: Vec<Contact> = vec![
+            Contact {
+                phone_number: String::from("+13055550112"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+13175550123"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+14155550135"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+16085550190"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+17135550167"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+16025550177"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+13605550158"),
+                ..Default::default()
+            },
+            Contact {
+                phone_number: String::from("+12175550194"),
+                ..Default::default()
+            },
+        ];
+
+        match async_std::task::block_on(prsr.file_dump()) {
+            Ok(contacts) => {
+                assert!((contacts.len() > 0), "No contacts has been parsed");
+
+                let phone_numbers_1: std::collections::HashSet<_> =
+                    contacts.iter().map(|p| p.phone_number.clone()).collect();
+                let phone_numbers_2: std::collections::HashSet<_> =
+                    original.iter().map(|p| p.phone_number.clone()).collect();
+                assert_eq!(phone_numbers_1, phone_numbers_2, "No match");
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        };
+    }
+
+    #[test]
+    fn test_save_file() {
+        let prsr = super::NumberParser {
+            filepath: String::from(TEST_NUMBERS_0),
+        };
+        let results = async_std::task::block_on(prsr.file_dump());
+        assert!(results.is_ok(), "File dump not successful");
+        let test_output_file: &str = "test-numbers.json";
+
+        let contacts = results.unwrap();
+        async_std::task::block_on(prsr.save_file(contacts, test_output_file));
+        let file_exists = {
+            let path = std::path::Path::new(test_output_file);
+            path.exists()
+        };
+
+        assert!(file_exists, "Contacts were not saved");
+        match std::fs::remove_file(test_output_file) {
+            Ok(_) => {
+                println!("File removed");
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        }
+    }
+}